Renesas R5F12048ANA#40

Overview

R5F12048ANA#40 from Renesas Electronics is an 8 KB flash, 1 KB RAM RL78/G15 16-pin microcontroller with 7-channel 8/10-bit ADC, dual simplified I²C, UART, and 8-channel 16-bit timer array, operating from 2.4 V to 5.5 V across −40°C to +105°C for industrial sensor control and low-power HMI applications.

For engineers reviewing the R5F12048ANA#40 datasheet, R5F12048ANA#40 pinout, R5F12048ANA#40 application, or R5F12048ANA#40 equivalent, key selection criteria include its HWQFN-16 package, 16 MHz high-speed on-chip oscillator (±1.0% accuracy at −20°C to +85°C), integrated comparator, data flash endurance (1M rewrites), and support for STOP/HALT low-power modes.

Technical Context

The R5F12048ANA#40 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, 1 MB address space, and selectable power-on-reset (SPOR) with four voltage thresholds. It integrates a dedicated low-speed on-chip oscillator (15 kHz) for watchdog operation independent of main clock sources.

Its peripheral set includes two simplified I²C interfaces (IIC00 and IIC01), one UART channel (UART0), two CSI channels (CSI00 and CSI01), and a programmable clock/buzzer output (PCLBUZ0) supporting up to 10 MHz output frequency when fMAIN = 10 MHz.

Key Specifications

Pinout & Package

Package: HWQFN-16 (3 mm × 3 mm, 0.5 mm pitch), exposed die pad requiring PCB thermal pad connection with no electrical tie.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F12047ANA#40 and R5F12048GNA#40, the R5F12048ANA#40 delivers optimal balance of compact HWQFN-16 packaging, full 8 KB flash capacity, and industrial-grade −40°C to +105°C operation - making it ideal for space-constrained, production-ready embedded controllers.

Availability

R5F12048ANA#40 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, programmable power meters, and appliance motor control interfaces requiring stable component supply across extended temperature ranges.

Supply support for R5F12048ANA#40 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G15 product line targets cost-sensitive, ultra-low-power industrial and consumer applications demanding high integration, robustness across −40°C to +125°C, and seamless toolchain support via CS+ and e2 studio.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F12048ANA#40?

The R5F12048ANA#40 features a high-speed on-chip oscillator configurable from 1 MHz to 16 MHz. At −20°C to +85°C, its frequency accuracy is ±1.0% over VDD = 2.4 V to 5.5 V. Accuracy degrades to ±1.5% at −40°C to −20°C and ±1.5% at +85°C to +105°C per industrial-grade (G) specification. The R5F12048ANA#40 uses this oscillator as the default reset boot clock before switching to X1 if configured.

Does R5F12048ANA#40 support background data flash rewriting while executing code from main flash?

No, the R5F12048ANA#40 does not support background operation (BGO) for data flash. During data flash rewrite operations, instruction execution from code flash memory is halted. This means firmware must enter a safe state-disabling interrupts and halting time-critical tasks-before initiating a data flash write. The R5F12048ANA#40 guarantees 1,000,000 rewrite cycles at full VDD range, but BGO is explicitly unsupported per datasheet Section 1.1.

How many analog input channels and what ADC resolution does R5F12048ANA#40 provide?

The R5F12048ANA#40 integrates an 8/10-bit successive approximation ADC with 7 analog input channels (ANI0 through ANI6). Resolution is selectable per conversion, and the ADC operates across the full VDD range of 2.4 V to 5.5 V. An internal reference voltage of 0.815 V (TYP.) is provided, and external references may be applied via IVREF0. This ADC capability is confirmed for the 16-pin HWQFN variant in Table 1-4 and Section 1.6.

What communication interfaces are available on R5F12048ANA#40, and are they pin-multiplexed?

The R5F12048ANA#40 provides one UART channel (RxD0/TxD0), two simplified I²C interfaces (IIC00 and IIC01), and two CSI channels (CSI00 and CSI01, SPI-compatible). All are fully pin-multiplexed: for example, P06 supports SI01/SDA01/SCLA0 and P07 supports SCK01/SCL01/SDAA0. Pin assignment is controlled by the Peripheral I/O Redirection Registers (PIOR0–PIOR3), enabling flexible routing without hardware changes - a confirmed feature in the RL78/G15 User's Manual and datasheet Section 1.3.3.

What is the package type and thermal pad requirement for R5F12048ANA#40?

The R5F12048ANA#40 uses a 16-pin HWQFN package (3 mm × 3 mm, 0.5 mm pitch) with an exposed die pad. Per datasheet Section 1.3.3 Remark 3, this pad must be soldered to a non-electrically connected plated area on the PCB for thermal dissipation. No electrical connection to VSS or any other net is permitted. This mechanical mounting requirement is mandatory for reliable long-term operation and is specific to the R5F12048ANA#40's NA suffix and #40 tape-and-reel packaging specification.